Cream butter and sugar, add sour cream, vanilla and eggs.
Mix in dry ingredients, except last three (topping)
Use Angel food cake pan, not greased.
Pour ½ batter, ¾ topping, ½ batter and ¼ topping until all is gone.
End with topping.
Bake at 350° for 1 hour.
When done, remove from oven and sprinkle top with water and return to oven for a few minutes.